Improvement in spike-machines



diritti titea DAVIDMEYINON, OF RICHMOND, VIRGINIA.V

LettersPatent No.`110,755, dated January 3, 187i.

IMPROVEMENT lN'SPlKE-MACHINES.

The Schedule referred to in these Letters Patent and making part of the sarna.

Nature and Object of the Invention.

My invention consistsl of an improvement, toofully Figure 5, a transverse section on the line 1 2, iig.'1.,

Figure 6, afront view' of the rotating die. Figure 7,'adiagram illustrating part of my improvement.4

General Description.

A and A. are the opposite side frames of the machin'e, to suitable bearings iirwhich is adapted a shaft, @carrying the griping-lever B, and to the latter is imparted a vibrating motiomthe movement in one direction being eiected bya cam, D, on the shaft O, 'and in the other direction by theweight of the lever itself, or, by what I prefer, ausprin'g or springs, as the latter insures a rapidity of action which is desirable in this machine owing to thehigh rate of speed at which it isintended to operate.

In ,the frame A, in front of the machine, revolve two rollers, E E,rwl1ich guidethe hot bar, and which vare provided with dies for severing or nearly severing a portion to be Vconveg'ted into ak spike, this severed portion being seized, torn away, and carried rearward to the under griping-die by reciprocating nippers, which may be briefly described as follows:

A slide, It, is adapted to guides on the oppositeside frames of the machine, and on this slide another slide, T, is arranged to have a limited independent movement.

vTo pins on the slide R are jointed the Dipper-arms Q @eaeh ofwhich has an inclined slot for receiving a pin on the slide T. Areciprocating movement is imparted to the slide T, from which the slide R derives its movement.

The opening and closing of the nippers are effected through the medium'of the pins and inclined slots iduring that portion of the movement of the slide AI which is independent of the slide R, while the reciprccating movementof the 'nippers is derived from that of the slide T. Y

Thesemovements of the nippers enable them to seize anearly severed piece of the hot bar, tear it away, and deposit it on the lower griping-die.

All the above-described parts can be found 'in- Swetts Well-known machine, for which Letters Patent were granted on' the 14th day of March, A. D, 1854.

The under griping-die of Swetts spike-machine, however, is permanent, and becomes hot. and expanded and imperfect as a grping medium, owing to the nearly constant presence on it of hot iron. v

Discarding the usual permanent die, I use the disk G, havingon its edge a number of recesses or dies, and` arranged 'to turn on a. `stationary pin, it, on the frame A. Y

The shape of each die will he best observed on reference to dg. 7, wherenx represents aport-ion ofthe spike-bar resting in a recess of corresponding size in theedge of the disk G, this recess being abruptly enlarged at 'In for the twofold purpose of atfording room Ifor the spreading of the head, and for admitting the end of the heading-bar H, the rear endk of which, jointed to a sliding cross-head, is actedon by cams I I on the shaft U, so as to impart a forward movement, the rearward movement of the heading-bar being accomplished. b'y springs or appropriate cams.

From the heading-har project two arms, .I J, one on each side, the end of cach'arm having a hole for the reception of a pin, n, on a slide,l K, adapted to a giiide, q, on a plate, M, which is so secured to one of the adjacent side frames of the machine as to admit of being turned to a limitedextent thereon, and secured after adj nstment.

When these plates q have been so adjusted that their guides q occupy the horizontal position shown in fig. 3, the movement of the header will be horizontal, and aepted tothe formationof heads central with the shank, for instancefthe heads of bolts; but, when the plates have been adj usted to the position shown in fig. 4, so that 'the guides are inclined, the outer end of the header will have both a downward and forward movement adapted to the formation of heads which project at' onev side of the shank, as the beveled heads of spikes.

l After the rhppers have torn a partially-severed piece from the hot bar, and deposited the same in one of the recesses or dies of the diskfthe outer end of the griping-lever descends and :firmly holds the piece `in the recess, when the header H, actuated by the cams I I, moves forward, enters the enlargement fm of .the die or recess, and upsets the end of the piece, a'fter which the header retreats, the griping-lever is raised, and the disk is turned to such an extent that another empty recess or die is ready for receiving from the nippers another piece of iron to be headed.

One of the important advantages of my improve.-

mentis the limited movement of the header compared 'with that in ordinary spike-machines. lIn the ,latter l the header must retreat so far out of the Way as to permit the formed spike to be discharged from the die in advance of and in line with the piece carried by the nippers, whereas the formed spike in my machine is 'at once turned out of the way with the disk. This limited movement of the header permits me to run the machine at a much higher rate of speed than ordinary machines.

Another important' feature of' my improvement, and one which also contribntes to an increased speed of the machine, is the facility which the revolving disk a'ords for maintaining the d isk cool. A constant stream of water can play on the under side of the disk, and this streamindependently of cooling the dies, w`ill`facilitate the removal therefrom, by anyA suitable mechanism', of the formed spikes or bolts,

`the shrinkage of which, on the application of water,

permits them to be easily freed from the recess.

(7 Za-im s.

this specification in the presence of tivo subscribing witnesses.

DAVID EYNON.

VVitn esses CHARLES E. FOSTER, JN0. B. HARDING. 

